She's a little surprised to hear him ask that question. Sure, she's heard him ask it earlier too, back when they ended up having a group hug together with Tony. But she thought he had realised by then that it was okay to just hug her whenever.

.. on the other hand, this is just very Ignis-like, isn't it? He's just polite enough to ask to make sure she's alright with it.

"Of course!"

Usually this is the part where she would have hugged him first, really, but when he's asking that sweetly she wants to make sure he gets the chance to initiate the hug as well. Maybe it'd get Ignis a bit more used to hugs as well?

"You can hug me whenever. Really. I never mind."